Bluetooth: Add management events for controller addition & removal

This patch adds Bluetooth Management interface events for controller
addition and removal. The events correspond to the existing HCI_DEV_REG
and HCI_DEV_UNREG stack internal events.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

4 files changed, 55 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 1992fac7e921..3786ee83604e 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -662,6 +662,8 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
 
 /* Management interface */
 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
+int mgmt_index_added(u16 index);
+int mgmt_index_removed(u16 index);
 
 /* HCI info for socket */
 #define hci_pi(sk) ((struct hci_pinfo *) sk)
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 70985aacc14b..ca29c1367ffd 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -75,3 +75,13 @@ struct mgmt_ev_controller_error {
         __le16 index;
         __u8 error_code;
 } __packed;
+
+#define MGMT_EV_INDEX_ADDED             0x0004
+struct mgmt_ev_index_added {
+        __le16 index;
+} __packed;
+
+#define MGMT_EV_INDEX_REMOVED           0x0005
+struct mgmt_ev_index_removed {
+        __le16 index;
+} __packed;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 51c61f75a797..1a4ec97d5ac4 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -960,6 +960,7 @@ int hci_register_dev(struct hci_dev *hdev)
                 }
         }
 
+        mgmt_index_added(hdev->id);
         hci_notify(hdev, HCI_DEV_REG);
 
         return id;
@@ -989,6 +990,7 @@ int hci_unregister_dev(struct hci_dev *hdev)
         for (i = 0; i < NUM_REASSEMBLY; i++)
                 kfree_skb(hdev->reassembly[i]);
 
+        mgmt_index_removed(hdev->id);
         hci_notify(hdev, HCI_DEV_UNREG);
 
         if (hdev->rfkill) {
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index d6c5a32de0b6..f827fd908380 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -265,3 +265,44 @@ done:
         kfree(buf);
         return err;
 }
+
+static int mgmt_event(u16 event, void *data, u16 data_len)
+{
+        struct sk_buff *skb;
+        struct mgmt_hdr *hdr;
+
+        skb = alloc_skb(sizeof(*hdr) + data_len, GFP_ATOMIC);
+        if (!skb)
+                return -ENOMEM;
+
+        bt_cb(skb)->channel = HCI_CHANNEL_CONTROL;
+
+        hdr = (void *) skb_put(skb, sizeof(*hdr));
+        hdr->opcode = cpu_to_le16(event);
+        hdr->len = cpu_to_le16(data_len);
+
+        memcpy(skb_put(skb, data_len), data, data_len);
+
+        hci_send_to_sock(NULL, skb);
+        kfree_skb(skb);
+
+        return 0;
+}
+
+int mgmt_index_added(u16 index)
+{
+        struct mgmt_ev_index_added ev;
+
+        put_unaligned_le16(index, &ev.index);
+
+        return mgmt_event(MGMT_EV_INDEX_ADDED, &ev, sizeof(ev));
+}
+
+int mgmt_index_removed(u16 index)
+{
+        struct mgmt_ev_index_added ev;
+
+        put_unaligned_le16(index, &ev.index);
+
+        return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev));
+}